Supercharge your Sigma Greenhouse with the Sigma Automatic Roof Vent. Improve air circulation by bringing in the fresh outside breeze, keeping your plants healthy and disease-free.

The automatic roof vent is heat-activated, which requires no electrical power or programming. This function ensures that hot air escapes during the day, preventing shriveling or withering of your plants.

Sigma Automatic Roof Vent Features:

• Made from galvanized steel and polycarbonate for long-lasting durability
• Automatic, heat-activated opening
• Rust-resistant and low maintenance year-round.
• Simple design for fast and easy installation.
• 3 1.4 size

Please note: this window only fits Sigma Greenhouse models.

The number of windows recommended depends on the size of the greenhouse, the environment youre located, and the types of plants that youre planning on growing. The following numbers, however, are good a starting point:

• Sigma Urban (10×13): 2-4 windows
• Sigma 20 (10×19.5): 4-6 windows
• Sigma 26 (10×26): 6 windows
• Sigma 32 (10×32): 6-8 windows

It’s recommended to install an even number of roof vents on either side of the greenhouse for optimum airflow.

Technical data:

• Size: 3 ft wide by 1.4 ft tall (91.4 cm by 42.6 cm)
• Maximum window opening: approximately 45cm (17 23/32 in) depending on adjustment and load
• Start opening temperature: 17 C-25C (62,60F-77F)
• Maximum opening temperature: 30 C (86F)